like a window object:
theDiv = divWindow.document.layers[divID]
if (theDiv)
{
theDiv.document.open();
theDiv.document.write(html);
theDiv.document.close();
}
}
else if (document.all)
{
// This browser supports an MSIE-like DOM
theDiv = divWindow.document.all[divID]
if (theDiv) theDiv.innerHTML = html
}
else if (document.getElementById)
{
// This browser supports getElementByID
theDiv = divWindow.document.getElementById(divID)
if (theDiv) theDiv.innerHTML = html
}
if (theDiv==null)
{
playMedia_error(filename, "Could not find a
with ID '" + divID + "' inside the specified window.")
return
}
}
else
{
// target is a window reference (possibly to newly-opened popup)
target.document.write(html)
if (closeDoc) target.document.close()
}
return
}
//------------------------------------------------------------------------------------------------
function IsWindow(item)
{
// Performs a rough test to determine whether the passed item is a reference to a window object.
// If item is a window object, the function returns true.
// It item is not a window object, the function *almost* always returns false, but it's possible
// to fool it by passing any object which has a "window" property equal to the object itself.
if (item==null)
return false
else
return (item.window==item) // This syntax works, even if item's not an object
}
//------------------------------------------------------------------------------------------------
function playMedia_error(filename, errMsg)
{
var msg = "The PlayMedia function was unable to process the file, \"" + filename + "\"."
msg += "\nReason: " + errMsg
alert(msg)
}
//------------------------------------------------------------------------------------------------
function squashProps(theObject)
{
// Returns a copy of theObject in which all the property names have been forced to lower case
var newObject = new Object()
for (var prop in theObject) newObject[prop.toLowerCase()] = theObject[prop]
return newObject
}
//------------------------------------------------------------------------------------------------
function playAudio(locn_ref, filename)
{
// Loads and plays an audio file in the "aux1" frame
playMedia(window.aux1, locn_ref, filename)
}
//------------------------------------------------------------------------------------------------
function playServerAudio(locn_ref, filename)
{
// Loads and plays a "server only" audio file in the "aux1" frame
playMedia(window.aux1, locn_ref, filename, null, true)
}
//------------------------------------------------------------------------------------------------
function stopAudio()
{
// Loads dummy contents into the "aux1" frame, thus stopping any sound that may be playing there.
self.aux1.document.write("")
self.aux1.document.close()
}
//------------------------------------------------------------------------------------------------
function URLglue(base, rel_path)
{
/*
Builds and returns a URL to the resource indicated by base and rel_path. Parameters:
base - A relative or absolute URL that indicates a folder. A trailing "/" is optional.
May also be blank, in which case the returned URL is the same as rel_path.
rel_path - A relative URL. May also be blank, in which case the returned URL is the same
as base (possibly with a trailing "/" appended).
If there are no errors in the parameters, the function returns a URL for rel_path which assumes
rel_path is relative to base. If base is an absolute URL, the returned URL will also be absolute.
If an error is found in the parameters (for example, if rel_path can't be interpreted as relative
to base), an alert is displayed, and the function returns null.
The function assumes there are no leading or trailing spaces in base or in rel_path.
*/
var error
var old_base = base
var old_rel_path = rel_path
var isRoot = base.charAt(0)=="/" || base.indexOf("://") != -1
if (base.charAt(base.length-1) == "/") base = base.substring(0, base.length-1) // Strip trailing "/"
if (rel_path.charAt(0)=="/" || rel_path.indexOf("://") != -1) error = true // rel_path is an absolute URL
var done = ((rel_path.substring(0,3) != "../" || base.length == 0) && !error)
while (!done)
{
rel_path = rel_path.substring(3) // Chop off first 3 characters
base = base.substring(0, base.lastIndexOf("/")) // Chop trailing directory and the preceding "/"
if (base.length == 0)
{
done = true
if (isRoot && rel_path.substring(0,3) == "../") error = true
}
else if (/(\w|\.\.|:)$/.test(base)==false) // if base does not end with letter/digit/underscore/double-dot/colon
{
done = true
error = true
}
else if (rel_path.substring(0,3) != "../")
done = true
}
if (error)
{
alert("Invalid arguments passed to URLglue:\n" + old_base + "\n" + old_rel_path)
return null
}
else
{
if (base.length > 0 || isRoot) base += "/" //Put the slash back on
return base + rel_path
}
}
//--------------------------------------------------------------------
//opens last page accessed (in previous session) when the last-page toolbar button is pressed
function get_last_page(text) {
//pulls last page from Electric Blackboard
if (XML_MENU) show_content("menu_index"); else show_content("loc")
if ((v_name != "") && (typeof v_name != "undefined")) {
//gives user a choice of whether to open last page; also gives above function time to get link before page is changed
if (window.confirm(text)) {
if (XML_MENU) {
var page1 = v_name;
show_content("page_index");
var page2 = v_name;
change_page(page1," ",page2);
//parent.main.location = v_name;
}
else
window.main.location = v_name
}
}
else {
alert("Error: Cannot load the last lesson page opened.");
}
}
//--------------------------------------------------------------------
// Adds new data to the global variable "notebook_content", which will eventually
// be written to the Electric Blackboard. This data is usually, but not necessarily,
// the content of a notebook assignment.
function save_contents(delimiter,contents) {
var added, result, parsed_result
if (SAVE_DATA)
{
var is_a_notebook = (!(delimiter=="menu_index" || delimiter=="page_index" || delimiter=="loc" || delimiter=="loc2"))
if (XML_MENU)
{
if (delimiter=="menu_index") {
window.ie_page1 = contents;
if (window.main.document.title == "Page Not Found") contents = ""
}
if (delimiter=="page_index") window.ie_page2 = contents;
}
if (delimiter=="loc" || delimiter=="loc2") {
if (window.main.document.title == "Page Not Found") contents = ""
}
if (notebook_content == "") {
notebook_content = delimiter+"&y#&"+contents+"&z&&"
added = true
}
else {
added = false
result = notebook_content.split(/&z&&/)
for (var i=0;i
=0;i--) if (!whitespace.test(prefix.charAt(i))) break;
prefix = prefix.substring(0,i+1) + " "
}
else
{
trailingwhite.exec(prefix);
prefix = RegExp.$1 + " "
}
}
if (suffix==null || allwhite.test(suffix))
suffix = ""
else
{
if (inSafari())
{
for (i=0;i\n"
html += "\n"
html += "\n"
html += "Click here to retrieve a fresh copy of your " + docDescription
html += " (" + filename + "). Be sure to save it on a disk where you can easily locate it.
\n"
html += "NOTE: If you've already saved a copy of this document, please open the saved copy instead.
\n"
if (showSaveBlurb)
{
html += "If you need to review how to save and submit your work, including any images\n"
html += "or graphics you wish to include as part of your project, refer to the\n"
html += "Saving and Submitting Assignments instructions.
\n"
}
html += "
\n" //(required for NS 4.x)
html += "\n"
html += "\n"
html += "
<\/a>';
}
else {
bread[b] = '